你会做下列加法题吗？
①What's six and one? It's ____.
②What's two and three? It's ____.
③What's zero and nine? It's____.
④What's four and three? It's____.
⑤What's one and five? It's____.
求证：对任何实数k，x2+y2﹣2kx﹣（2k+6）y﹣2k﹣31=0恒过两定点，并求经过该两定点且面积最小的圆E的方程；
心理学的“感觉剥夺实验”证明了（ ）
Hello! My name is D.T. I'm a monster. I'm a boy. I have a big head and a small body. I have one eye, two mouth, three nose and four ears. My face is green.My eyes are blue. I have two arms and three legs. I have three hands and nine fingers. My hands are yellow. I feel very cool.
近来，小华为了看清书上的字，眼睛与书的距离和视力正常时相比越来越近了，这说明小华已（ ）
